.middle-main {
    width: 100%;
    height: 2255px;
    background-color: #f7f7f5;
    padding-bottom: 50px;
  }
  .interior {
    min-width: 1024px;
    max-width: 1190px;
    height: 2205px;
    margin: 0px auto;
    .interior-top{
        height: 60px;
        padding-top: 60px;
    }
  }
  .section{
      .main{
          .left-bottom{
                display: none;
            }
          .nav-left:hover .left-bottom{
            
            display: block
          };
      }
  }